亚洲精品久久视频,国产精品久久久久桃色tv,三级av网站

#include<reg52.h>
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
sbit KeyIn_1 = P2^7;
sbit KeyIn_2 = P2^6;
sbit KeyIn_3 = P2^5;
sbit KeyIn_4 = P2^4;
sbit KeyOut_1 = P2^3;
sbit KeyOut_2 = P2^2;
sbit KeyOut_3 = P2^1;
sbit KeyOut_4 = P2^0;
unsigned char code LedChar[16] = { //數碼管真值表
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
unsigned char keyStatus[4][4] = { //全部矩陣按鍵當前的狀態
{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}
};
void main(){
unsigned char i,j;
unsigned char cnt = 0;
unsigned char backUp[4][4] = {{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}}; //按鍵狀態，保存前一次的值
EA = 1;
ENLED = 0;
ADDR3 = 1;
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0;
TMOD = 0x01;
TH0 = 0xFC;
TL0 = 0x67;
ET0 = 1;
TR0 = 1;
P0 = LedChar[cnt];
while(1){
for(i = 0; i < 4; i++){
for(j = 0;j < 4; j++){
if(backUp[i][j] != keyStatus[i][j]){
if(backUp[i][j] == 0){ //按鍵抬起
cnt++;
if(cnt >= 16){
cnt = 0;
}
P0 = LedChar[cnt];
}
backUp[i][j] = keyStatus[i][j];
}
}
}
}
}
/*T0中斷服務函數，判斷按鍵狀態并消抖*/
void interruptTimer0() interrupt 1{
unsigned char i;
static unsigned char keyOut = 0;
static unsigned char keyBuff[4][4] = {
{0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF} //矩陣按鍵掃描緩沖區
};
TH0 = 0xFC;
TL0 = 0x67;
keyBuff[keyOut][0] = (keyBuff[keyOut][0] << 1) | KeyIn_1; //按位與，將KeyIn_1的最后一位移入緩沖區。按位與的結果：最后1位是0就移入0，是1就移入1。
keyBuff[keyOut][1] = (keyBuff[keyOut][1] << 1) | KeyIn_2; //按位與，將KeyIn_2的最后一位移入緩沖區。按位與的結果：最后1位是0就移入0，是1就移入1。
keyBuff[keyOut][2] = (keyBuff[keyOut][2] << 1) | KeyIn_3; //按位與，將KeyIn_3的最后一位移入緩沖區。按位與的結果：最后1位是0就移入0，是1就移入1。
keyBuff[keyOut][3] = (keyBuff[keyOut][3] << 1) | KeyIn_4; //按位與，將KeyIn_4的最后一位移入緩沖區。按位與的結果：最后1位是0就移入0，是1就移入1。
//更新消抖狀態
for(i = 0; i <= 3 ; i++){
if((keyBuff[keyOut][i] & 0x0F) == 0x00){
keyStatus[keyOut][i] = 0;
}
else if((keyBuff[keyOut][i] & 0x0F) == 0x0F){
keyStatus[keyOut][i] = 1;
}
}
//執行下一次的掃描輸出
keyOut++;
if(keyOut > 4){
keyOut = 0;
}
//根據索引keyOut，釋放當前輸出引腳，拉低下次的輸出引腳。
switch(keyOut){
case 0: KeyOut_4 = 1; KeyOut_1 = 0; break;
case 1: KeyOut_1 = 1; KeyOut_2 = 0; break;
case 2: KeyOut_2 = 1; KeyOut_3 = 0; break;
case 3: KeyOut_3 = 1; KeyOut_4 = 0; break;
default: break;
}
}

復制代碼

久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费